This is based upon what one assumes God would do, but for which there is zero record in Scripture of or promise specific to Mary of it occurring, and is contrary to what is revealed, which is that the bodily resurrection and giving of rewards (and crowns) does not occur until the Lord returns.
And this, and such things as the sinlessness of Mary is also contrary to the manner of Scriptural revelation, in which the Holy Spirit characteristically records notable or extraordinary aspects of even lesser persons, from their age, holiness, prolonged virginity, or sinlessness, etc.
All which renders the Assumption as a binding doctrine as lacking warrant, and is based upon the also unwarranted premise of the perpetual assured magisterial infallibility of Rome.
And which does not mean i do not want to honor Mary (among others) in accordance with what is written, and God above all. And thus see my responses on Salon.com to the atheistic arrogance that this thread refers to: Why rape is so intrinsic to religion (Mary Got Raped:Salon Click Bait)
Yes, it is based on faith; hope of the good without evidence. Enoch, Moses, Elijah, Lazarus, and untold other saints were either translated or raised from the dead. You simply don't know everything from the scriptures that exist at the present time. The LORD Jesus Christ did not promise to build a Bible; He promised to build a church against which the gates of hell will not prevail.
I invite you to attend Midnight Mass tonight to publicly confess faith in the LORD Jesus Christ.